Air-cooled internal-combustion engine



Dec. 23, 1930. H. A. FLOGAUS AIRCOOLED INTERNAL COMBUSTION ENGINE Filed Oct. 26, 1927 2 $heets-$heet l ma /L v. E E w w T i W Q H. A. FLoGAus AIR COOLED INTERNAL COMBUSTION ENGINE Dec 23, 1930.

Filed Oct. 26, 1927' 2 Sheets-Sheet 2 Patented Dec, 23, 1930 .UNITED- STATES PATENT OFFICE nowann A. FLOGAUS', or DETROIT, Jamaican, assrenoza TO RALPH L. SKINNEB, or

- nn'rnorr, MICHIGAN AIR- COOLED-INTERNAL GOMBUSTION ENGINE Application filed October 26, 1327. Serial No. 228,741.

This invention concerns new means and arrangements of associated elements to cool the heads and cyllnders of an internal-combustion motor and to supply heated air under ploy'ed to designate the same parts, it being understood, however, that the invention is susceptible of incorporation in physical form in various waysand is not restricted to this particular embodiment.

In these drawings: 4

Figure 1 is a side elevation of the engine showing the air-blower;

Figure 2 is an elevation of the opposite side of the engine, illustrating the air connections to the carburetor;

Figure 3 is a fragmentary cross-section on line 3-3 of Fi 1 on an enlarged scale and with parts bro en away; and

Figure 4: is an enlarged cross-section through one cylinder of the engine on line 4-4 of Fig. 1.

Referring to these drawings it will be understood that the multicylinder rotary engine has a plurality of radially disposedcylinders 11 all connected to a central casing 12 accommodating the crank-shaft 13 equipped at one end with an air-blower 14: receiving external air and delivering it under pressure through a discharge-pipe 15 to a circular manifold 16.

Each cylinder, as is shown in Figures 3,

and 4, has a somewhat depressed or sunken anti-detonating head 17 having a stepped or abruptly shouldered inner surface 18 which acts to so commingle the gases as to prevent a too-rapid gas combustion and any objectionable sound of detonation, each such head having a bent air jacket or conduit 19 through which the spark-plug socket 21 extends.-

One end of each such passage 19 is con-' nected by a pipe 22 to the ring-shaped air. supply manifold 16 and the opposite end of the jacket 19 is oined by a radially-disposed pipe 23 to acentral diffusing or mixing chamber 24 connected to the carburetor 25 whose throttle-valve 26 controls or' governs the supply of gaseous fuel mixture under pressure to the radiating, fuel, inlet pipes 27 communicating at their outer ends to the intake-ports 28 of the cylinders, each of the latter having an opposed exhaust-port 29 and an associated discharge-pipe 31.

Each cylinder 11, equipped exteriorly with a plurality of separated, circular, outstanding, cooling fins or flanges 32, 32, has within it a stationary inner. cylinder or sleeve 33, reciprocatory, ported, sliding valves 34 and 35 operating between them to open and close the inlet and discharge ports at the proper times, each specified inner cylinder having the usual iston 36 and its connecting-rod 37.

From t e foregoing it will be clear that the air-blower acts as a super-charger for the carburetor, the air from the blower being fed under head to per orm'its cooling function.

On entering each such head, by reason of the central depression 38 in the top wall of the air-jacket of the head, the current of air is deflected downwardly directly on to the upper surface of the anti-detonating wall of the head, whereby it more efliciently and adequately cools such wall, thus permitting the latter, by reason of its reduced temperature, to perform its explosion retarding or antidetonating function more satisfactorily and more effectively. 7

Those skilled in this art will readily under-. stand that this invention is not limited and confined to this particular embodiment of the invention and that more Or less radical mechanical changes may be incorporated in the structure without departing from the heart and essence of the invention as defined by the ap ended claims, and without the loss of any 0 its material benefits and advantages.

ressure through each cylinder- For example, the position of the blower in the system may be varied, it merely being required that such blower shall cause the air to traverse the air-jackets and be delivered after being thus heated to the carburetor.

I claim:

1. In an internal-combustion engine, the combination of an engine-cylinder and its head, the latter having a cooling air-jacket with admission and discharge ports, a carbureter and its connections to feed the fuelmixture to said cylinder, an air-blower operated by the engine, means to conduct the air from said blower to said air-jacket admission-port, and means to convey the air from said jacket discharge-port to the air-intake of said carbureter.

2. In an internal-combustion engine, the combination of a plurality of engine-cylinders, each having an air-jacketed head With admission and discharge ports, a carbureter and its connections to feed fuel-mixture to said cylinders, an air-blower operated by the engine, means to conduct the air from said blower to all of said air-jacket admissionports, and means to convey-the air from all of said jacket discharge-ports to the air-intake of said carbureter.

In witness whereof I have hereunto set my hand.

HOWARD A. FLOGAUS. 

